Multiple catalytic processing stations enable a method for producing volatile gas streams from biomass decomposition at discrete increasing temperatures. A reservoir assembly is positioned at least partially within the enclosure assembly and is configured to contain an infusible fluid. The bipolar plate can be more compliant than the diffusion media members and the active elements used to form the individual fuel cells. The pivot member includes a surface coated with a flexible material. Such an embodiment is useful over conventional methods because adjusting the pre-charge voltage can result in power savings.